From: Peter Xu <peterx@redhat.com>
To: Alistair Popple <apopple@nvidia.com>
Cc: Balbir Singh <bsingharora@gmail.com>,
John Hubbard <jhubbard@nvidia.com>,
Andrew Morton <akpm@linux-foundation.org>,
linux-mm@kvack.org, nouveau@lists.freedesktop.org,
bskeggs@redhat.com, rcampbell@nvidia.com,
linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org,
dri-devel@lists.freedesktop.org, hch@infradead.org,
jglisse@redhat.com, willy@infradead.org, jgg@nvidia.com,
hughd@google.com, Christoph Hellwig <hch@lst.de>
Subject: Re: [PATCH v9 07/10] mm: Device exclusive memory access
Date: Fri, 4 Jun 2021 11:20:49 -0400 [thread overview]
Message-ID: <YLpE0U789jvD2zxN@t490s> (raw)
In-Reply-To: <10231977.pWpf7cJbZl@nvdebian>
On Fri, Jun 04, 2021 at 11:07:42AM +1000, Alistair Popple wrote:
> On Friday, 4 June 2021 12:47:40 AM AEST Peter Xu wrote:
> > External email: Use caution opening links or attachments
> >
> > On Thu, Jun 03, 2021 at 09:39:32PM +1000, Alistair Popple wrote:
> > > Reclaim won't run on the page due to the extra references from the special
> > > swap entries.
> >
> > That sounds reasonable, but I didn't find the point that stops it, probably
> > due to my limited knowledge on the reclaim code. Could you elaborate?
>
> Sure, it isn't immediately obvious but it ends up being detected at the start
> of is_page_cache_freeable() in the pageout code:
>
>
> static pageout_t pageout(struct page *page, struct address_space *mapping)
> {
>
> [...]
>
> if (!is_page_cache_freeable(page))
> return PAGE_KEEP;
I did look at pageout() but still missed this small helper indeed (while it's
so important to know..), thanks!
--
Peter Xu
WARNING: multiple messages have this Message-ID (diff)
From: Peter Xu <peterx@redhat.com>
To: Alistair Popple <apopple@nvidia.com>
Cc: rcampbell@nvidia.com, willy@infradead.org,
linux-doc@vger.kernel.org, nouveau@lists.freedesktop.org,
Balbir Singh <bsingharora@gmail.com>,
hughd@google.com, linux-kernel@vger.kernel.org,
dri-devel@lists.freedesktop.org, hch@infradead.org,
linux-mm@kvack.org, bskeggs@redhat.com, jgg@nvidia.com,
Andrew Morton <akpm@linux-foundation.org>,
Christoph Hellwig <hch@lst.de>
Subject: Re: [Nouveau] [PATCH v9 07/10] mm: Device exclusive memory access
Date: Fri, 4 Jun 2021 11:20:49 -0400 [thread overview]
Message-ID: <YLpE0U789jvD2zxN@t490s> (raw)
In-Reply-To: <10231977.pWpf7cJbZl@nvdebian>
On Fri, Jun 04, 2021 at 11:07:42AM +1000, Alistair Popple wrote:
> On Friday, 4 June 2021 12:47:40 AM AEST Peter Xu wrote:
> > External email: Use caution opening links or attachments
> >
> > On Thu, Jun 03, 2021 at 09:39:32PM +1000, Alistair Popple wrote:
> > > Reclaim won't run on the page due to the extra references from the special
> > > swap entries.
> >
> > That sounds reasonable, but I didn't find the point that stops it, probably
> > due to my limited knowledge on the reclaim code. Could you elaborate?
>
> Sure, it isn't immediately obvious but it ends up being detected at the start
> of is_page_cache_freeable() in the pageout code:
>
>
> static pageout_t pageout(struct page *page, struct address_space *mapping)
> {
>
> [...]
>
> if (!is_page_cache_freeable(page))
> return PAGE_KEEP;
I did look at pageout() but still missed this small helper indeed (while it's
so important to know..), thanks!
--
Peter Xu
_______________________________________________
Nouveau mailing list
Nouveau@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/nouveau
WARNING: multiple messages have this Message-ID (diff)
From: Peter Xu <peterx@redhat.com>
To: Alistair Popple <apopple@nvidia.com>
Cc: rcampbell@nvidia.com, willy@infradead.org,
linux-doc@vger.kernel.org, nouveau@lists.freedesktop.org,
Balbir Singh <bsingharora@gmail.com>,
hughd@google.com, linux-kernel@vger.kernel.org,
dri-devel@lists.freedesktop.org, hch@infradead.org,
linux-mm@kvack.org, jglisse@redhat.com, bskeggs@redhat.com,
jgg@nvidia.com, John Hubbard <jhubbard@nvidia.com>,
Andrew Morton <akpm@linux-foundation.org>,
Christoph Hellwig <hch@lst.de>
Subject: Re: [PATCH v9 07/10] mm: Device exclusive memory access
Date: Fri, 4 Jun 2021 11:20:49 -0400 [thread overview]
Message-ID: <YLpE0U789jvD2zxN@t490s> (raw)
In-Reply-To: <10231977.pWpf7cJbZl@nvdebian>
On Fri, Jun 04, 2021 at 11:07:42AM +1000, Alistair Popple wrote:
> On Friday, 4 June 2021 12:47:40 AM AEST Peter Xu wrote:
> > External email: Use caution opening links or attachments
> >
> > On Thu, Jun 03, 2021 at 09:39:32PM +1000, Alistair Popple wrote:
> > > Reclaim won't run on the page due to the extra references from the special
> > > swap entries.
> >
> > That sounds reasonable, but I didn't find the point that stops it, probably
> > due to my limited knowledge on the reclaim code. Could you elaborate?
>
> Sure, it isn't immediately obvious but it ends up being detected at the start
> of is_page_cache_freeable() in the pageout code:
>
>
> static pageout_t pageout(struct page *page, struct address_space *mapping)
> {
>
> [...]
>
> if (!is_page_cache_freeable(page))
> return PAGE_KEEP;
I did look at pageout() but still missed this small helper indeed (while it's
so important to know..), thanks!
--
Peter Xu
next prev parent reply other threads:[~2021-06-04 15:20 UTC|newest]
Thread overview: 123+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-24 13:27 [PATCH v9 00/10] Add support for SVM atomics in Nouveau Alistair Popple
2021-05-24 13:27 ` Alistair Popple
2021-05-24 13:27 ` [Nouveau] " Alistair Popple
2021-05-24 13:27 ` [PATCH v9 01/10] mm: Remove special swap entry functions Alistair Popple
2021-05-24 13:27 ` Alistair Popple
2021-05-24 13:27 ` [Nouveau] " Alistair Popple
2021-05-24 13:27 ` [PATCH v9 02/10] mm/swapops: Rework swap entry manipulation code Alistair Popple
2021-05-24 13:27 ` Alistair Popple
2021-05-24 13:27 ` [Nouveau] " Alistair Popple
2021-05-24 13:27 ` [PATCH v9 03/10] mm/rmap: Split try_to_munlock from try_to_unmap Alistair Popple
2021-05-24 13:27 ` Alistair Popple
2021-05-24 13:27 ` [Nouveau] " Alistair Popple
2021-05-25 18:39 ` Liam Howlett
2021-05-25 18:39 ` Liam Howlett
2021-05-25 18:39 ` [Nouveau] " Liam Howlett
2021-05-25 23:45 ` Shakeel Butt
2021-05-25 23:45 ` Shakeel Butt
2021-05-25 23:45 ` [Nouveau] " Shakeel Butt
2021-05-25 23:45 ` Shakeel Butt
2021-06-04 20:49 ` Liam Howlett
2021-06-04 20:49 ` Liam Howlett
2021-06-04 20:49 ` [Nouveau] " Liam Howlett
2021-06-05 0:41 ` Shakeel Butt
2021-06-05 0:41 ` Shakeel Butt
2021-06-05 0:41 ` [Nouveau] " Shakeel Butt
2021-06-05 0:41 ` Shakeel Butt
2021-06-05 3:39 ` Liam Howlett
2021-06-05 3:39 ` Liam Howlett
2021-06-05 3:39 ` [Nouveau] " Liam Howlett
2021-06-05 4:19 ` Shakeel Butt
2021-06-05 4:19 ` Shakeel Butt
2021-06-05 4:19 ` [Nouveau] " Shakeel Butt
2021-06-05 4:19 ` Shakeel Butt
2021-06-07 4:51 ` Alistair Popple
2021-06-07 4:51 ` Alistair Popple
2021-06-07 4:51 ` [Nouveau] " Alistair Popple
2021-05-24 13:27 ` [PATCH v9 04/10] mm/rmap: Split migration into its own function Alistair Popple
2021-05-24 13:27 ` Alistair Popple
2021-05-24 13:27 ` [Nouveau] " Alistair Popple
2021-05-24 13:27 ` [PATCH v9 05/10] mm: Rename migrate_pgmap_owner Alistair Popple
2021-05-24 13:27 ` Alistair Popple
2021-05-24 13:27 ` [Nouveau] " Alistair Popple
2021-05-26 19:41 ` Peter Xu
2021-05-26 19:41 ` Peter Xu
2021-05-26 19:41 ` [Nouveau] " Peter Xu
2021-05-24 13:27 ` [PATCH v9 06/10] mm/memory.c: Allow different return codes for copy_nonpresent_pte() Alistair Popple
2021-05-24 13:27 ` Alistair Popple
2021-05-24 13:27 ` [Nouveau] " Alistair Popple
2021-05-26 19:50 ` Peter Xu
2021-05-26 19:50 ` Peter Xu
2021-05-26 19:50 ` [Nouveau] " Peter Xu
2021-05-27 1:20 ` Alistair Popple
2021-05-27 1:20 ` Alistair Popple
2021-05-27 1:20 ` [Nouveau] " Alistair Popple
2021-05-27 1:44 ` Peter Xu
2021-05-27 1:44 ` Peter Xu
2021-05-27 1:44 ` [Nouveau] " Peter Xu
2021-05-24 13:27 ` [PATCH v9 07/10] mm: Device exclusive memory access Alistair Popple
2021-05-24 13:27 ` Alistair Popple
2021-05-24 13:27 ` [Nouveau] " Alistair Popple
2021-05-24 22:11 ` Andrew Morton
2021-05-24 22:11 ` Andrew Morton
2021-05-24 22:11 ` [Nouveau] " Andrew Morton
2021-05-25 1:31 ` John Hubbard
2021-05-25 1:31 ` John Hubbard
2021-05-25 1:31 ` [Nouveau] " John Hubbard
2021-05-25 9:21 ` Alistair Popple
2021-05-25 9:21 ` Alistair Popple
2021-05-25 9:21 ` [Nouveau] " Alistair Popple
2021-05-25 11:51 ` Balbir Singh
2021-05-25 11:51 ` Balbir Singh
2021-05-25 11:51 ` [Nouveau] " Balbir Singh
2021-05-26 7:17 ` John Hubbard
2021-05-26 7:17 ` John Hubbard
2021-05-26 7:17 ` [Nouveau] " John Hubbard
2021-05-26 13:30 ` Alistair Popple
2021-05-26 13:30 ` Alistair Popple
2021-05-26 13:30 ` [Nouveau] " Alistair Popple
2021-06-02 8:50 ` Balbir Singh
2021-06-02 8:50 ` Balbir Singh
2021-06-02 8:50 ` [Nouveau] " Balbir Singh
2021-06-02 14:37 ` Peter Xu
2021-06-02 14:37 ` Peter Xu
2021-06-02 14:37 ` [Nouveau] " Peter Xu
2021-06-03 11:39 ` Alistair Popple
2021-06-03 11:39 ` Alistair Popple
2021-06-03 11:39 ` [Nouveau] " Alistair Popple
2021-06-03 14:47 ` Peter Xu
2021-06-03 14:47 ` Peter Xu
2021-06-03 14:47 ` [Nouveau] " Peter Xu
2021-06-04 1:07 ` Alistair Popple
2021-06-04 1:07 ` Alistair Popple
2021-06-04 1:07 ` [Nouveau] " Alistair Popple
2021-06-04 15:20 ` Peter Xu [this message]
2021-06-04 15:20 ` Peter Xu
2021-06-04 15:20 ` [Nouveau] " Peter Xu
2021-06-03 8:37 ` John Hubbard
2021-06-03 8:37 ` John Hubbard
2021-06-03 8:37 ` [Nouveau] " John Hubbard
2021-05-26 19:28 ` Peter Xu
2021-05-26 19:28 ` Peter Xu
2021-05-26 19:28 ` [Nouveau] " Peter Xu
2021-05-27 3:35 ` Alistair Popple
2021-05-27 3:35 ` Alistair Popple
2021-05-27 3:35 ` [Nouveau] " Alistair Popple
2021-05-27 13:04 ` Peter Xu
2021-05-27 13:04 ` Peter Xu
2021-05-27 13:04 ` [Nouveau] " Peter Xu
2021-05-28 1:48 ` Alistair Popple
2021-05-28 1:48 ` Alistair Popple
2021-05-28 1:48 ` [Nouveau] " Alistair Popple
2021-05-28 13:11 ` Peter Xu
2021-05-28 13:11 ` Peter Xu
2021-05-28 13:11 ` [Nouveau] " Peter Xu
2021-05-24 13:27 ` [PATCH v9 08/10] mm: Selftests for exclusive device memory Alistair Popple
2021-05-24 13:27 ` Alistair Popple
2021-05-24 13:27 ` [Nouveau] " Alistair Popple
2021-05-24 13:27 ` [PATCH v9 09/10] nouveau/svm: Refactor nouveau_range_fault Alistair Popple
2021-05-24 13:27 ` Alistair Popple
2021-05-24 13:27 ` [Nouveau] " Alistair Popple
2021-05-24 13:27 ` [PATCH v9 10/10] nouveau/svm: Implement atomic SVM access Alistair Popple
2021-05-24 13:27 ` Alistair Popple
2021-05-24 13:27 ` [Nouveau] " Alistair Popple
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